In discussing the relative stability of the wage share,
the fact that it stays to within an order of magnitude of
50%, rather than falling to 1 0r rising to 99%, one
might perhaps look at the sort of stochastic mechanism
that is invoked by biologists to explain the stability
of the sex ratio in most species at around 50%.
This is just brainstorming, so dont pay excessive attention.
In general I feel that we need to look a lot more closely
at stochastic effects not only here, but also in explaining
why the law of value appears to operate as a law.